[PATCH v2 2/6] MdePkg: MmCommunication2: Update MM communicate2 function description

["Kun Qin" <kuqin12@gmail.com>]

Current MM communicate2 function definition described input arguments
`CommBufferPhysical`, `CommBufferVirtual` and `CommSize` as input only,
which mismatches with the "input and output type" as in PI specification.

This change updated function descriptions of MM communite2 definition to
match input argument types.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>

Signed-off-by: Kun Qin <kuqin12@gmail.com>
---

Notes:
    v2:
    - Newly added

 MdePkg/Include/Protocol/MmCommunication2.h | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/MdePkg/Include/Protocol/MmCommunication2.h b/MdePkg/Include/Protocol/MmCommunication2.h
index 3495a7327f76..1b56320c7fff 100644
--- a/MdePkg/Include/Protocol/MmCommunication2.h
+++ b/MdePkg/Include/Protocol/MmCommunication2.h
@@ -27,12 +27,13 @@ typedef struct _EFI_MM_COMMUNICATION2_PROTOCOL EFI_MM_COMMUNICATION2_PROTOCOL;
 
   This function provides a service to send and receive messages from a registered UEFI service.
 
-  @param[in] This                The EFI_MM_COMMUNICATION_PROTOCOL instance.
-  @param[in] CommBufferPhysical  Physical address of the MM communication buffer
-  @param[in] CommBufferVirtual   Virtual address of the MM communication buffer
-  @param[in] CommSize            The size of the data buffer being passed in. On exit, the size of data
-                                 being returned. Zero if the handler does not wish to reply with any data.
-                                 This parameter is optional and may be NULL.
+  @param[in] This                     The EFI_MM_COMMUNICATION_PROTOCOL instance.
+  @param[in, out] CommBufferPhysical  Physical address of the MM communication buffer
+  @param[in, out] CommBufferVirtual   Virtual address of the MM communication buffer
+  @param[in, out] CommSize            The size of the data buffer being passed in. On exit, the
+                                      size of data being returned. Zero if the handler does not
+                                      wish to reply with any data. This parameter is optional
+                                      and may be NULL.
 
   @retval EFI_SUCCESS            The message was successfully posted.
   @retval EFI_INVALID_PARAMETER  CommBufferPhysical was NULL or CommBufferVirtual was NULL.
-- 
2.32.0.windows.1